Improving the fit of crowns with die spacers

Grajower, Rafael; Zuberi, Yuval; Lewinstein, Israel

doi:10.1016/0022-3913(89)90275-8

Cited by 77 publications

(51 citation statements)

References 8 publications

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“…As such, the application of a marginally maladapted prosthesis can result in the loss of proper orientation 19) . On the other hand, if the internal gap is too small, the prosthesis will be mounted imperfectly and, thus, its stability will be compromised 20) . Thus far, many researchers have attempted to establish marginal and internal space standards for dental prostheses, through theoretical and experimental work.…”

Section: Discussionmentioning

confidence: 99%

Influence of various gypsum materials on precision of fit of CAD/CAM-fabricated zirconia copings

Kim

et al. 2015

Dent. Mater. J.

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The clinical applicability of CAD/CAM-fabricated zirconia copings is tested using working models made from four different highstrength Type IV gypsum materials. Each of the four materials was used to fabricate 15 zirconia copings. Precision of fit was measured with a digital electron microscope using the silicone replica technique. The mean and standard deviation of each reference point were analyzed using the one-way analysis of the variance (ANOVA) and Tukey's honest significant difference (HSD) tests (α=0.05). The overall marginal and internal fits of the zirconia copings were as follows: GS (GS: Grey Stone) group: 91.43 μm, LS (LS: Light green Stone) Group: 87.89 μm, RS (RS: Red Stone) Group: 88.75 μm, BS (BS: Beige Stone) Group: 82.78 μm. There were no significant differences between the mean adaptations of the gypsum varieties (p>0.05). This confirmed that the type of gypsum material used does not determine the precision of fit of a prosthesis.

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Section: Discussionmentioning

confidence: 99%

Influence of various gypsum materials on precision of fit of CAD/CAM-fabricated zirconia copings

Kim

et al. 2015

Dent. Mater. J.

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“…38 It involves painting several layers of die relief agent over the whole of the die but avoiding the finish line. The increased cement space results in more rapid seating with decreased deformation of the restoration.…”

Section: Resin Cementsmentioning

confidence: 99%

Crowns and other extra-coronal restorations: Try-in and cementation of crowns

2002

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Having successfully negotiated the planning, preparation, impression and prescription of your crown, the cementation stage represents the culmination of all your efforts. This stage is not difficult, but a successful outcome needs as much care as the preceding stages. Once a restoration is cemented there is no scope for modification or repeat. You have to get it right first time. Decemented crowns often have thick layers of residual cement suggesting problems with either initial seating or cement handling. When the fate of restorations costing hundreds of pounds depends on correct proportioning of cements and the quality of the mix, the value of a well-trained and experienced dental nurse is easy to see. Both dentist and nurse need a working knowledge of the materials they are handling.

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“…There is greater consistency when evaluating the cause and effect relationship of die spacer thickness and marginal gap. 2, 3 and 4 The magnitude of the marginal gap observed without the use of die spacer was as high as 649 μm 3 . The marginal gap was significantly improved from 479 μm to 38 μm as the die spacer thickness was increased from 1 to 8 layers.…”

mentioning

confidence: 93%